OpenGLRenderer.cpp revision fb5e23c327cd5f8f93d1eaa7c10f34d6fd3efb6c
1e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy/* 2e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * Copyright (C) 2010 The Android Open Source Project 3e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * 4e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * Licensed under the Apache License, Version 2.0 (the "License"); 5e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * you may not use this file except in compliance with the License. 6e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * You may obtain a copy of the License at 7e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * 8e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * http://www.apache.org/licenses/LICENSE-2.0 9e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * 10e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * Unless required by applicable law or agreed to in writing, software 11e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * distributed under the License is distributed on an "AS IS" BASIS, 12e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * See the License for the specific language governing permissions and 14e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy * limitations under the License. 15e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy */ 16e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 1785bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guy#define LOG_TAG "OpenGLRenderer" 18e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 19e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy#include <stdlib.h> 20e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy#include <stdint.h> 21e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy#include <sys/types.h> 22e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 23bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy#include <SkCanvas.h> 245cbbce535744b89df5ecea95de21ee3733298260Romain Guy 25121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy#include <cutils/properties.h> 265cbbce535744b89df5ecea95de21ee3733298260Romain Guy#include <utils/Log.h> 2785bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guy 2885bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guy#include "OpenGLRenderer.h" 29e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 30e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guynamespace android { 319d5316e3f56d138504565ff311145ac01621dff4Romain Guynamespace uirenderer { 329d5316e3f56d138504565ff311145ac01621dff4Romain Guy 339d5316e3f56d138504565ff311145ac01621dff4Romain Guy/////////////////////////////////////////////////////////////////////////////// 349d5316e3f56d138504565ff311145ac01621dff4Romain Guy// Defines 359d5316e3f56d138504565ff311145ac01621dff4Romain Guy/////////////////////////////////////////////////////////////////////////////// 369d5316e3f56d138504565ff311145ac01621dff4Romain Guy 37121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy// These properties are defined in mega-bytes 38121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy#define PROPERTY_TEXTURE_CACHE_SIZE "ro.hwui.texture_cache_size" 39121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy#define PROPERTY_LAYER_CACHE_SIZE "ro.hwui.layer_cache_size" 40121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy 41dda570201ac851dd85af3861f7e575721d3345daRomain Guy#define DEFAULT_TEXTURE_CACHE_SIZE 20 42dda570201ac851dd85af3861f7e575721d3345daRomain Guy#define DEFAULT_LAYER_CACHE_SIZE 10 43f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy#define DEFAULT_PATCH_CACHE_SIZE 100 44dda570201ac851dd85af3861f7e575721d3345daRomain Guy 45121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy// Converts a number of mega-bytes into bytes 46121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy#define MB(s) s * 1024 * 1024 47121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy 48dda570201ac851dd85af3861f7e575721d3345daRomain Guy// Generates simple and textured vertices 49bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy#define SV(x, y) { { x, y } } 50bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy#define FV(x, y, u, v) { { x, y }, { u, v } } 519d5316e3f56d138504565ff311145ac01621dff4Romain Guy 529d5316e3f56d138504565ff311145ac01621dff4Romain Guy/////////////////////////////////////////////////////////////////////////////// 539d5316e3f56d138504565ff311145ac01621dff4Romain Guy// Globals 549d5316e3f56d138504565ff311145ac01621dff4Romain Guy/////////////////////////////////////////////////////////////////////////////// 559d5316e3f56d138504565ff311145ac01621dff4Romain Guy 56026c5e16704e817cac7d9c382914c947e34f87e0Romain Guystatic const SimpleVertex gDrawColorVertices[] = { 57bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy SV(0.0f, 0.0f), 58bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy SV(1.0f, 0.0f), 59bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy SV(0.0f, 1.0f), 60bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy SV(1.0f, 1.0f) 619d5316e3f56d138504565ff311145ac01621dff4Romain Guy}; 62026c5e16704e817cac7d9c382914c947e34f87e0Romain Guystatic const GLsizei gDrawColorVertexStride = sizeof(SimpleVertex); 63026c5e16704e817cac7d9c382914c947e34f87e0Romain Guystatic const GLsizei gDrawColorVertexCount = 4; 649d5316e3f56d138504565ff311145ac01621dff4Romain Guy 65026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy// This array is never used directly but used as a memcpy source in the 66026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy// OpenGLRenderer constructor 67026c5e16704e817cac7d9c382914c947e34f87e0Romain Guystatic const TextureVertex gDrawTextureVertices[] = { 68c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy FV(0.0f, 0.0f, 0.0f, 0.0f), 69c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy FV(1.0f, 0.0f, 1.0f, 0.0f), 70c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy FV(0.0f, 1.0f, 0.0f, 1.0f), 71c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy FV(1.0f, 1.0f, 1.0f, 1.0f) 72bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy}; 73026c5e16704e817cac7d9c382914c947e34f87e0Romain Guystatic const GLsizei gDrawTextureVertexStride = sizeof(TextureVertex); 74026c5e16704e817cac7d9c382914c947e34f87e0Romain Guystatic const GLsizei gDrawTextureVertexCount = 4; 75026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy 76026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy// In this array, the index of each Blender equals the value of the first 77026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy// entry. For instance, gBlends[1] == gBlends[SkXfermode::kSrc_Mode] 78026c5e16704e817cac7d9c382914c947e34f87e0Romain Guystatic const Blender gBlends[] = { 79026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kClear_Mode, GL_ZERO, GL_ZERO }, 80026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kSrc_Mode, GL_ONE, GL_ZERO }, 81026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kDst_Mode, GL_ZERO, GL_ONE }, 82026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kSrcOver_Mode, GL_ONE, GL_ONE_MINUS_SRC_ALPHA }, 83026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kDstOver_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ONE }, 84026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kSrcIn_Mode, GL_DST_ALPHA, GL_ZERO }, 85026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kDstIn_Mode, GL_ZERO, GL_SRC_ALPHA }, 86026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kSrcOut_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ZERO }, 87026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kDstOut_Mode, GL_ZERO, GL_ONE_MINUS_SRC_ALPHA }, 88026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kSrcATop_Mode, GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA }, 89026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kDstATop_Mode, GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA }, 90026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy { SkXfermode::kXor_Mode, GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA } 91026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy}; 92e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 93f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 94f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy// Constructors/destructor 95f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 96f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 97dda570201ac851dd85af3861f7e575721d3345daRomain GuyOpenGLRenderer::OpenGLRenderer(): 9882ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy mBlend(false), mLastSrcMode(GL_ZERO), mLastDstMode(GL_ZERO), 99dda570201ac851dd85af3861f7e575721d3345daRomain Guy mTextureCache(MB(DEFAULT_TEXTURE_CACHE_SIZE)), 100f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy mLayerCache(MB(DEFAULT_LAYER_CACHE_SIZE)), 101f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy mPatchCache(DEFAULT_PATCH_CACHE_SIZE) { 10285bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guy LOGD("Create OpenGLRenderer"); 1039d5316e3f56d138504565ff311145ac01621dff4Romain Guy 104121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy char property[PROPERTY_VALUE_MAX]; 105121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy if (property_get(PROPERTY_TEXTURE_CACHE_SIZE, property, NULL) > 0) { 106dda570201ac851dd85af3861f7e575721d3345daRomain Guy LOGD(" Setting texture cache size to %sMB", property); 107121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy mTextureCache.setMaxSize(MB(atoi(property))); 108dda570201ac851dd85af3861f7e575721d3345daRomain Guy } else { 109dda570201ac851dd85af3861f7e575721d3345daRomain Guy LOGD(" Using default texture cache size of %dMB", DEFAULT_TEXTURE_CACHE_SIZE); 110dda570201ac851dd85af3861f7e575721d3345daRomain Guy } 111dda570201ac851dd85af3861f7e575721d3345daRomain Guy 112dda570201ac851dd85af3861f7e575721d3345daRomain Guy if (property_get(PROPERTY_LAYER_CACHE_SIZE, property, NULL) > 0) { 113dda570201ac851dd85af3861f7e575721d3345daRomain Guy LOGD(" Setting layer cache size to %sMB", property); 114dda570201ac851dd85af3861f7e575721d3345daRomain Guy mLayerCache.setMaxSize(MB(atoi(property))); 115dda570201ac851dd85af3861f7e575721d3345daRomain Guy } else { 116dda570201ac851dd85af3861f7e575721d3345daRomain Guy LOGD(" Using default layer cache size of %dMB", DEFAULT_LAYER_CACHE_SIZE); 117121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy } 118121e2242565d5f09ad83a2d33ecd2225838802c5Romain Guy 1199d5316e3f56d138504565ff311145ac01621dff4Romain Guy mDrawColorShader = new DrawColorProgram; 120bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy mDrawTextureShader = new DrawTextureProgram; 121026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy 122026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy memcpy(mDrawTextureVertices, gDrawTextureVertices, sizeof(gDrawTextureVertices)); 123e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy} 124e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 12585bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain GuyOpenGLRenderer::~OpenGLRenderer() { 12685bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guy LOGD("Destroy OpenGLRenderer"); 127ce0537b80087a6225273040a987414b1dd081aa0Romain Guy 128ce0537b80087a6225273040a987414b1dd081aa0Romain Guy mTextureCache.clear(); 129dda570201ac851dd85af3861f7e575721d3345daRomain Guy mLayerCache.clear(); 130e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy} 131e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 132f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 133f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy// Setup 134f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 135f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 13685bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guyvoid OpenGLRenderer::setViewport(int width, int height) { 13708ae317c21ec3086b5017672bba87420cc38a407Romain Guy glViewport(0, 0, width, height); 13808ae317c21ec3086b5017672bba87420cc38a407Romain Guy 13908ae317c21ec3086b5017672bba87420cc38a407Romain Guy mat4 ortho; 140c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy ortho.loadOrtho(0, width, height, 0, -1, 1); 14108ae317c21ec3086b5017672bba87420cc38a407Romain Guy ortho.copyTo(mOrthoMatrix); 142bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 143bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy mWidth = width; 144bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy mHeight = height; 145f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy mFirstSnapshot.height = height; 146e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy} 147e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 14885bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guyvoid OpenGLRenderer::prepare() { 1497ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot = &mFirstSnapshot; 1507ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSaveCount = 0; 151f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 15208ae317c21ec3086b5017672bba87420cc38a407Romain Guy glDisable(GL_SCISSOR_TEST); 153bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 15408ae317c21ec3086b5017672bba87420cc38a407Romain Guy glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 15508ae317c21ec3086b5017672bba87420cc38a407Romain Guy glClear(GL_COLOR_BUFFER_BIT); 156bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 15708ae317c21ec3086b5017672bba87420cc38a407Romain Guy glEnable(GL_SCISSOR_TEST); 158c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy glScissor(0, 0, mWidth, mHeight); 159f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 160bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy mSnapshot->clipRect.set(0.0f, 0.0f, mWidth, mHeight); 161bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy} 162bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 163f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 164f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy// State management 165f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 166f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 167bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guyint OpenGLRenderer::getSaveCount() const { 1687ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy return mSaveCount; 169bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy} 170bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 171bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guyint OpenGLRenderer::save(int flags) { 1727ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy return saveSnapshot(); 173bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy} 174bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 175bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guyvoid OpenGLRenderer::restore() { 1767ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy if (mSaveCount == 0) return; 177bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 1787ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy if (restoreSnapshot()) { 1797ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy setScissorFromClip(); 1807ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy } 181bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy} 182bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 183bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guyvoid OpenGLRenderer::restoreToCount(int saveCount) { 1847ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy if (saveCount <= 0 || saveCount > mSaveCount) return; 185bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 1867ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy bool restoreClip = false; 187bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 1887ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy while (mSaveCount != saveCount - 1) { 1897ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy restoreClip |= restoreSnapshot(); 1907ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy } 191bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 1927ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy if (restoreClip) { 1937ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy setScissorFromClip(); 1947ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy } 195bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy} 196bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 197bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guyint OpenGLRenderer::saveSnapshot() { 1987ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot = new Snapshot(mSnapshot); 1997ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy return ++mSaveCount; 200bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy} 201bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 202bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guybool OpenGLRenderer::restoreSnapshot() { 2037ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy bool restoreClip = mSnapshot->flags & Snapshot::kFlagClipSet; 204bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy bool restoreLayer = mSnapshot->flags & Snapshot::kFlagIsLayer; 205f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy bool restoreOrtho = mSnapshot->flags & Snapshot::kFlagDirtyOrtho; 206bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 207bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy sp<Snapshot> current = mSnapshot; 2087ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy sp<Snapshot> previous = mSnapshot->previous; 209bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 210f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy if (restoreOrtho) { 211f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy memcpy(mOrthoMatrix, current->orthoMatrix, sizeof(mOrthoMatrix)); 212f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy } 213f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy 214bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy if (restoreLayer) { 215d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy composeLayer(current, previous); 216d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy } 217bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 218d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy mSnapshot = previous; 219d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy mSaveCount--; 2205cbbce535744b89df5ecea95de21ee3733298260Romain Guy 221d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy return restoreClip; 222d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy} 2235cbbce535744b89df5ecea95de21ee3733298260Romain Guy 224d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guyvoid OpenGLRenderer::composeLayer(sp<Snapshot> current, sp<Snapshot> previous) { 225dda570201ac851dd85af3861f7e575721d3345daRomain Guy if (!current->layer) { 226dda570201ac851dd85af3861f7e575721d3345daRomain Guy LOGE("Attempting to compose a layer that does not exist"); 227dda570201ac851dd85af3861f7e575721d3345daRomain Guy return; 228dda570201ac851dd85af3861f7e575721d3345daRomain Guy } 229dda570201ac851dd85af3861f7e575721d3345daRomain Guy 230d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy // Unbind current FBO and restore previous one 231d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy // Most of the time, previous->fbo will be 0 to bind the default buffer 232d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy glBindFramebuffer(GL_FRAMEBUFFER, previous->fbo); 2335cbbce535744b89df5ecea95de21ee3733298260Romain Guy 234d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy // Restore the clip from the previous snapshot 235d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy const Rect& clip = previous->getMappedClip(); 236d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy glScissor(clip.left, mHeight - clip.bottom, clip.getWidth(), clip.getHeight()); 237bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 238dda570201ac851dd85af3861f7e575721d3345daRomain Guy Layer* layer = current->layer; 239dda570201ac851dd85af3861f7e575721d3345daRomain Guy 240d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy // Compute the correct texture coordinates for the FBO texture 241d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy // The texture is currently as big as the window but drawn with 242d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy // a quad of the appropriate size 243dda570201ac851dd85af3861f7e575721d3345daRomain Guy const Rect& rect = layer->layer; 244dda570201ac851dd85af3861f7e575721d3345daRomain Guy 245dda570201ac851dd85af3861f7e575721d3345daRomain Guy drawTextureRect(rect.left, rect.top, rect.right, rect.bottom, 24682ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy layer->texture, layer->alpha, layer->mode, layer->blend); 247bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 248dda570201ac851dd85af3861f7e575721d3345daRomain Guy LayerSize size(rect.getWidth(), rect.getHeight()); 249f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy // Failing to add the layer to the cache should happen only if the 250f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy // layer is too large 251dda570201ac851dd85af3861f7e575721d3345daRomain Guy if (!mLayerCache.put(size, layer)) { 252dda570201ac851dd85af3861f7e575721d3345daRomain Guy LAYER_LOGD("Deleting layer"); 253bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 254dda570201ac851dd85af3861f7e575721d3345daRomain Guy glDeleteFramebuffers(1, &layer->fbo); 255dda570201ac851dd85af3861f7e575721d3345daRomain Guy glDeleteTextures(1, &layer->texture); 256dda570201ac851dd85af3861f7e575721d3345daRomain Guy 257dda570201ac851dd85af3861f7e575721d3345daRomain Guy delete layer; 258dda570201ac851dd85af3861f7e575721d3345daRomain Guy } 259bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy} 260bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 261f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 262bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy// Layers 263bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy/////////////////////////////////////////////////////////////////////////////// 264bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 265bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guyint OpenGLRenderer::saveLayer(float left, float top, float right, float bottom, 266bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy const SkPaint* p, int flags) { 267d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy int count = saveSnapshot(); 268d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy 269d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy int alpha = 255; 270d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy SkXfermode::Mode mode; 271d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy 272d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy if (p) { 273d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy alpha = p->getAlpha(); 274d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy const bool isMode = SkXfermode::IsMode(p->getXfermode(), &mode); 275d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy if (!isMode) { 276d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy // Assume SRC_OVER 277d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy mode = SkXfermode::kSrcOver_Mode; 278d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy } 279d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy } else { 280d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy mode = SkXfermode::kSrcOver_Mode; 281d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy } 282d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy 283d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy createLayer(mSnapshot, left, top, right, bottom, alpha, mode, flags); 284d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy 285d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy return count; 286bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy} 287bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 288bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guyint OpenGLRenderer::saveLayerAlpha(float left, float top, float right, float bottom, 289bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy int alpha, int flags) { 290bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy int count = saveSnapshot(); 291d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy createLayer(mSnapshot, left, top, right, bottom, alpha, SkXfermode::kSrcOver_Mode, flags); 292d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy return count; 293d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy} 294bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 295d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guybool OpenGLRenderer::createLayer(sp<Snapshot> snapshot, float left, float top, 296d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy float right, float bottom, int alpha, SkXfermode::Mode mode,int flags) { 297bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 298dda570201ac851dd85af3861f7e575721d3345daRomain Guy LAYER_LOGD("Requesting layer %dx%d", size.width, size.height); 299dda570201ac851dd85af3861f7e575721d3345daRomain Guy LAYER_LOGD("Layer cache size = %d", mLayerCache.getSize()); 300dda570201ac851dd85af3861f7e575721d3345daRomain Guy 301f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy GLuint previousFbo = snapshot->previous.get() ? snapshot->previous->fbo : 0; 302f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy LayerSize size(right - left, bottom - top); 303dda570201ac851dd85af3861f7e575721d3345daRomain Guy 304f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy Layer* layer = mLayerCache.get(size, previousFbo); 305f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy if (!layer) { 306f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy return false; 307bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy } 308bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 309f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy glBindFramebuffer(GL_FRAMEBUFFER, layer->fbo); 310f18fd99b5c182329cd8936a9611f0103d8ece44aRomain Guy 311f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy // Clear the FBO 312f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy glDisable(GL_SCISSOR_TEST); 313f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 314f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy glClear(GL_COLOR_BUFFER_BIT); 315f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy glEnable(GL_SCISSOR_TEST); 316f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy 317dda570201ac851dd85af3861f7e575721d3345daRomain Guy // Save the layer in the snapshot 318d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy snapshot->flags |= Snapshot::kFlagIsLayer; 319dda570201ac851dd85af3861f7e575721d3345daRomain Guy layer->mode = mode; 320dda570201ac851dd85af3861f7e575721d3345daRomain Guy layer->alpha = alpha / 255.0f; 321dda570201ac851dd85af3861f7e575721d3345daRomain Guy layer->layer.set(left, top, right, bottom); 322dda570201ac851dd85af3861f7e575721d3345daRomain Guy 323dda570201ac851dd85af3861f7e575721d3345daRomain Guy snapshot->layer = layer; 324dda570201ac851dd85af3861f7e575721d3345daRomain Guy snapshot->fbo = layer->fbo; 325d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy 326f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy // Creates a new snapshot to draw into the FBO 327f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy saveSnapshot(); 328f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy // TODO: This doesn't preserve other transformations (check Skia first) 329f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy mSnapshot->transform.loadTranslate(-left, -top, 0.0f); 330f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy mSnapshot->clipRect.set(left, top, right, bottom); 331f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy mSnapshot->height = bottom - top; 332f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy setScissorFromClip(); 333f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy 334f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy mSnapshot->flags = Snapshot::kFlagDirtyTransform | Snapshot::kFlagDirtyOrtho | 335f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy Snapshot::kFlagClipSet; 336f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy memcpy(mSnapshot->orthoMatrix, mOrthoMatrix, sizeof(mOrthoMatrix)); 337f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy 338f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy // Change the ortho projection 339f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy mat4 ortho; 340f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy ortho.loadOrtho(0.0f, right - left, bottom - top, 0.0f, 0.0f, 1.0f); 341f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy ortho.copyTo(mOrthoMatrix); 342f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy 343d55a86120dd1e8ebcc6906c9ffd463f7460348daRomain Guy return true; 344bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy} 345bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 346bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy/////////////////////////////////////////////////////////////////////////////// 347f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy// Transforms 348f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 349f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 350f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guyvoid OpenGLRenderer::translate(float dx, float dy) { 3517ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->transform.translate(dx, dy, 0.0f); 3527ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->flags |= Snapshot::kFlagDirtyTransform; 353f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy} 354f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 355f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guyvoid OpenGLRenderer::rotate(float degrees) { 3567ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->transform.rotate(degrees, 0.0f, 0.0f, 1.0f); 3577ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->flags |= Snapshot::kFlagDirtyTransform; 358f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy} 359f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 360f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guyvoid OpenGLRenderer::scale(float sx, float sy) { 3617ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->transform.scale(sx, sy, 1.0f); 3627ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->flags |= Snapshot::kFlagDirtyTransform; 363f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy} 364f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 365f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guyvoid OpenGLRenderer::setMatrix(SkMatrix* matrix) { 3667ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->transform.load(*matrix); 3677ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->flags |= Snapshot::kFlagDirtyTransform; 368f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy} 369f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 370f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guyvoid OpenGLRenderer::getMatrix(SkMatrix* matrix) { 3717ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->transform.copyTo(*matrix); 372f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy} 373f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 374f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guyvoid OpenGLRenderer::concatMatrix(SkMatrix* matrix) { 3757ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mat4 m(*matrix); 3767ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->transform.multiply(m); 3777ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->flags |= Snapshot::kFlagDirtyTransform; 378f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy} 379f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 380f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 381f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy// Clipping 382f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 383f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 384bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guyvoid OpenGLRenderer::setScissorFromClip() { 3857ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy const Rect& clip = mSnapshot->getMappedClip(); 386f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy glScissor(clip.left, mSnapshot->height - clip.bottom, clip.getWidth(), clip.getHeight()); 3879d5316e3f56d138504565ff311145ac01621dff4Romain Guy} 3889d5316e3f56d138504565ff311145ac01621dff4Romain Guy 3899d5316e3f56d138504565ff311145ac01621dff4Romain Guyconst Rect& OpenGLRenderer::getClipBounds() { 3907ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy return mSnapshot->clipRect; 391bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy} 392bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guy 393c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guybool OpenGLRenderer::quickReject(float left, float top, float right, float bottom) { 394c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy /* 395c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * The documentation of quickReject() indicates that the specified rect 396c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * is transformed before being compared to the clip rect. However, the 397c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * clip rect is not stored transformed in the snapshot and can thus be 398c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * compared directly 399c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * 400c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * The following code can be used instead to performed a mapped comparison: 401c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * 402c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * mSnapshot->transform.mapRect(r); 403c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * const Rect& clip = mSnapshot->getMappedClip(); 404c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy * return !clip.intersects(r); 405c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy */ 406c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy Rect r(left, top, right, bottom); 407c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy return !mSnapshot->clipRect.intersects(r); 408c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy} 409c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy 410bb9524b6bdddc7ac77d8628daa8b366b8a7be4a4Romain Guybool OpenGLRenderer::clipRect(float left, float top, float right, float bottom) { 4117ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy bool clipped = mSnapshot->clipRect.intersect(left, top, right, bottom); 4127ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy if (clipped) { 4137ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy mSnapshot->flags |= Snapshot::kFlagClipSet; 4147ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy setScissorFromClip(); 4157ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy } 4167ae7ac48aa2b53453c9805075171ecd5bcafd7deRomain Guy return clipped; 417e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy} 418e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy 419f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 420f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy// Drawing 421f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy/////////////////////////////////////////////////////////////////////////////// 422f6a11b8a9e25ff9861bbba19251bea84d8a5daf2Romain Guy 423c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guyvoid OpenGLRenderer::drawBitmap(SkBitmap* bitmap, float left, float top, const SkPaint* paint) { 424f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy const Texture* texture = mTextureCache.get(bitmap); 42582ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy drawTextureRect(left, top, left + texture->width, top + texture->height, texture, paint); 4268ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy} 4278ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy 428f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guyvoid OpenGLRenderer::drawBitmap(SkBitmap* bitmap, const SkMatrix* matrix, const SkPaint* paint) { 429f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy Rect r(0.0f, 0.0f, bitmap->width(), bitmap->height()); 430f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy const mat4 transform(*matrix); 431f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy transform.mapRect(r); 432f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy 433f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy const Texture* texture = mTextureCache.get(bitmap); 43482ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy drawTextureRect(r.left, r.top, r.right, r.bottom, texture, paint); 435f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy} 436f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy 4378ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guyvoid OpenGLRenderer::drawBitmap(SkBitmap* bitmap, 4388ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy float srcLeft, float srcTop, float srcRight, float srcBottom, 4398ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy float dstLeft, float dstTop, float dstRight, float dstBottom, 440f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy const SkPaint* paint) { 441f86ef57f8bcd8ba43ce222ec6a8b4f67d3600640Romain Guy const Texture* texture = mTextureCache.get(bitmap); 4428ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy 4438ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy const float width = texture->width; 4448ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy const float height = texture->height; 445c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy 4468ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy const float u1 = srcLeft / width; 4478ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy const float v1 = srcTop / height; 4488ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy const float u2 = srcRight / width; 4498ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy const float v2 = srcBottom / height; 450c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy 4518ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy resetDrawTextureTexCoords(u1, v1, u2, v2); 4528ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy 45382ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy drawTextureRect(dstLeft, dstTop, dstRight, dstBottom, texture, paint); 4548ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy 4558ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 456ce0537b80087a6225273040a987414b1dd081aa0Romain Guy} 457ce0537b80087a6225273040a987414b1dd081aa0Romain Guy 458deba785f122a47915756ffd991f5540d952cf937Romain Guyvoid OpenGLRenderer::drawPatch(SkBitmap* bitmap, Res_png_9patch* patch, 459deba785f122a47915756ffd991f5540d952cf937Romain Guy float left, float top, float right, float bottom, const SkPaint* paint) { 460f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy const Texture* texture = mTextureCache.get(bitmap); 461f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy 462f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy int alpha; 463f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy SkXfermode::Mode mode; 464f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy getAlphaAndMode(paint, &alpha, &mode); 465f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy 466f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy Patch* mesh = mPatchCache.get(patch); 467fb5e23c327cd5f8f93d1eaa7c10f34d6fd3efb6cRomain Guy mesh->updateVertices(bitmap, left, top, right, bottom, 468fb5e23c327cd5f8f93d1eaa7c10f34d6fd3efb6cRomain Guy &patch->xDivs[0], &patch->yDivs[0], patch->numXDivs, patch->numYDivs); 469f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy 470f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy // Specify right and bottom as +1.0f from left/top to prevent scaling since the 471f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy // patch mesh already defines the final size 472f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy drawTextureMesh(left, top, left + 1.0f, top + 1.0f, texture->id, alpha, mode, texture->blend, 473f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy true, &mesh->vertices[0].position[0], &mesh->vertices[0].texture[0], mesh->indices, 474f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy mesh->indicesCount); 475f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy} 476f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy 47785bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guyvoid OpenGLRenderer::drawColor(int color, SkXfermode::Mode mode) { 478c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy const Rect& clip = mSnapshot->clipRect; 479026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy drawColorRect(clip.left, clip.top, clip.right, clip.bottom, color, mode); 480c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy} 4819d5316e3f56d138504565ff311145ac01621dff4Romain Guy 482bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guyvoid OpenGLRenderer::drawRect(float left, float top, float right, float bottom, const SkPaint* p) { 483026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy SkXfermode::Mode mode; 484026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy 485026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy const bool isMode = SkXfermode::IsMode(p->getXfermode(), &mode); 486026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy if (!isMode) { 487026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy // Assume SRC_OVER 488026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy mode = SkXfermode::kSrcOver_Mode; 489026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy } 490026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy 491026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy // Skia draws using the color's alpha channel if < 255 492026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy // Otherwise, it uses the paint's alpha 493026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy int color = p->getColor(); 494026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy if (((color >> 24) & 0xFF) == 255) { 495026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy color |= p->getAlpha() << 24; 496026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy } 497026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy 498026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy drawColorRect(left, top, right, bottom, color, mode); 499c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy} 5009d5316e3f56d138504565ff311145ac01621dff4Romain Guy 501026c5e16704e817cac7d9c382914c947e34f87e0Romain Guyvoid OpenGLRenderer::drawColorRect(float left, float top, float right, float bottom, 502026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy int color, SkXfermode::Mode mode) { 503026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy const int alpha = (color >> 24) & 0xFF; 504026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy const GLfloat a = alpha / 255.0f; 505026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy const GLfloat r = ((color >> 16) & 0xFF) / 255.0f; 506026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy const GLfloat g = ((color >> 8) & 0xFF) / 255.0f; 507026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy const GLfloat b = ((color ) & 0xFF) / 255.0f; 508026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy 50982ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy chooseBlending(alpha < 255, mode, true); 5109d5316e3f56d138504565ff311145ac01621dff4Romain Guy 511c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy mModelView.loadTranslate(left, top, 0.0f); 512c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy mModelView.scale(right - left, bottom - top, 1.0f); 5139d5316e3f56d138504565ff311145ac01621dff4Romain Guy 514c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy mDrawColorShader->use(&mOrthoMatrix[0], &mModelView.data[0], &mSnapshot->transform.data[0]); 5159d5316e3f56d138504565ff311145ac01621dff4Romain Guy 516c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy const GLvoid* p = &gDrawColorVertices[0].position[0]; 5179d5316e3f56d138504565ff311145ac01621dff4Romain Guy 518c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy glEnableVertexAttribArray(mDrawColorShader->position); 519c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy glVertexAttribPointer(mDrawColorShader->position, 2, GL_FLOAT, GL_FALSE, 520c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy gDrawColorVertexStride, p); 521c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy glVertexAttrib4f(mDrawColorShader->color, r, g, b, a); 5229d5316e3f56d138504565ff311145ac01621dff4Romain Guy 523c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy glDrawArrays(GL_TRIANGLE_STRIP, 0, gDrawColorVertexCount); 5249d5316e3f56d138504565ff311145ac01621dff4Romain Guy 525c7d53494f1fbd9f9d74af89053ff9fdb1ccbac6cRomain Guy glDisableVertexAttribArray(mDrawColorShader->position); 52682ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy} 527026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy 52882ba814ca0dea659be2cc6523bc0137679d961ceRomain Guyvoid OpenGLRenderer::drawTextureRect(float left, float top, float right, float bottom, 52982ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy const Texture* texture, const SkPaint* paint, bool isPremultiplied) { 53082ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy int alpha; 53182ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy SkXfermode::Mode mode; 53282ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy getAlphaAndMode(paint, &alpha, &mode); 53382ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy 53482ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy drawTextureMesh(left, top, right, bottom, texture->id, alpha / 255.0f, mode, texture->blend, 53582ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy isPremultiplied, &mDrawTextureVertices[0].position[0], 53682ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy &mDrawTextureVertices[0].texture[0], NULL); 53785bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guy} 53885bf02fc16784d935fb9eebfa9cb20fe46ff7951Romain Guy 539bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guyvoid OpenGLRenderer::drawTextureRect(float left, float top, float right, float bottom, 540c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy GLuint texture, float alpha, SkXfermode::Mode mode, bool blend, bool isPremultiplied) { 541f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy drawTextureMesh(left, top, right, bottom, texture, alpha, mode, blend, isPremultiplied, 542f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy &mDrawTextureVertices[0].position[0], &mDrawTextureVertices[0].texture[0], NULL); 543f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy} 544f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy 545f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guyvoid OpenGLRenderer::drawTextureMesh(float left, float top, float right, float bottom, 546f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy GLuint texture, float alpha, SkXfermode::Mode mode, bool blend, bool isPremultiplied, 547f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy GLvoid* vertices, GLvoid* texCoords, GLvoid* indices, GLsizei elementsCount) { 548bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy mModelView.loadTranslate(left, top, 0.0f); 549bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy mModelView.scale(right - left, bottom - top, 1.0f); 550bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 551bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy mDrawTextureShader->use(&mOrthoMatrix[0], &mModelView.data[0], &mSnapshot->transform.data[0]); 552bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 55382ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy chooseBlending(blend || alpha < 1.0f, mode, isPremultiplied); 554bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 555bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glBindTexture(GL_TEXTURE_2D, texture); 556bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 557c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy // TODO handle tiling and filtering here 558c1396e93b6a5286a5183c00c781b62e940a12c1fRomain Guy 559bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glActiveTexture(GL_TEXTURE0); 560bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glUniform1i(mDrawTextureShader->sampler, 0); 561bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 562bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glEnableVertexAttribArray(mDrawTextureShader->position); 563bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glVertexAttribPointer(mDrawTextureShader->position, 2, GL_FLOAT, GL_FALSE, 564f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy gDrawTextureVertexStride, vertices); 565bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 566bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glEnableVertexAttribArray(mDrawTextureShader->texCoords); 567bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glVertexAttribPointer(mDrawTextureShader->texCoords, 2, GL_FLOAT, GL_FALSE, 568f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy gDrawTextureVertexStride, texCoords); 569bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 570bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glVertexAttrib4f(mDrawTextureShader->color, 1.0f, 1.0f, 1.0f, alpha); 571bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 572f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy if (!indices) { 573f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy glDrawArrays(GL_TRIANGLE_STRIP, 0, gDrawTextureVertexCount); 574f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy } else { 575f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy glDrawElements(GL_TRIANGLES, elementsCount, GL_UNSIGNED_SHORT, indices); 576f7f93556c8fcc640ab5adef79d021a80a72a645aRomain Guy } 577bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 578bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glDisableVertexAttribArray(mDrawTextureShader->position); 579bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glDisableVertexAttribArray(mDrawTextureShader->texCoords); 580bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 581bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy glBindTexture(GL_TEXTURE_2D, 0); 58282ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy} 58382ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy 58482ba814ca0dea659be2cc6523bc0137679d961ceRomain Guyvoid OpenGLRenderer::chooseBlending(bool blend, SkXfermode::Mode mode, bool isPremultiplied) { 58582ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy // In theory we should not blend if the mode is Src, but it's rare enough 58682ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy // that it's not worth it 58782ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy blend = blend || mode != SkXfermode::kSrcOver_Mode; 58882ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy if (blend) { 58982ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy if (!mBlend) { 59082ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy glEnable(GL_BLEND); 59182ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy } 59282ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy 59382ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy GLenum sourceMode = gBlends[mode].src; 59482ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy GLenum destMode = gBlends[mode].dst; 59582ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy if (!isPremultiplied && sourceMode == GL_ONE) { 59682ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy sourceMode = GL_SRC_ALPHA; 59782ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy } 59882ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy 59982ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy if (sourceMode != mLastSrcMode || destMode != mLastDstMode) { 60082ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy glBlendFunc(sourceMode, destMode); 60182ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy mLastSrcMode = sourceMode; 60282ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy mLastDstMode = destMode; 60382ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy } 60482ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy } else if (mBlend) { 60582ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy glDisable(GL_BLEND); 60682ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy } 60782ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy mBlend = blend; 608bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy} 609bd6b79b40247aea7bfe13d0831c6c0472df6c636Romain Guy 610026c5e16704e817cac7d9c382914c947e34f87e0Romain Guyvoid OpenGLRenderer::resetDrawTextureTexCoords(float u1, float v1, float u2, float v2) { 61182ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy TextureVertex* v = &mDrawTextureVertices[0]; 61282ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy TextureVertex::setUV(v++, u1, v1); 61382ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy TextureVertex::setUV(v++, u2, v1); 61482ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy TextureVertex::setUV(v++, u1, v2); 61582ba814ca0dea659be2cc6523bc0137679d961ceRomain Guy TextureVertex::setUV(v++, u2, v2); 6168ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy} 6178ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy 6188ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guyvoid OpenGLRenderer::getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 6198ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy if (paint) { 6208ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy const bool isMode = SkXfermode::IsMode(paint->getXfermode(), mode); 6218ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy if (!isMode) { 6228ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy // Assume SRC_OVER 6238ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy *mode = SkXfermode::kSrcOver_Mode; 6248ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy } 6258ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy 6268ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy // Skia draws using the color's alpha channel if < 255 6278ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy // Otherwise, it uses the paint's alpha 6288ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy int color = paint->getColor(); 6298ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy *alpha = (color >> 24) & 0xFF; 6308ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy if (*alpha == 255) { 6318ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy *alpha = paint->getAlpha(); 6328ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy } 6338ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy } else { 6348ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy *mode = SkXfermode::kSrcOver_Mode; 6358ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy *alpha = 255; 6368ba548f81d1ab5f1750cbf86098c4a14e0b8beadRomain Guy } 637026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy} 638026c5e16704e817cac7d9c382914c947e34f87e0Romain Guy 6399d5316e3f56d138504565ff311145ac01621dff4Romain Guy}; // namespace uirenderer 640e4d011201cea40d46cb2b2eef401db8fddc5c9c6Romain Guy}; // namespace android 641